skysight-inc/HackerNews huggingface dataset:
With the regenerative braking on the Nissan Leaf (what I own and can speak to with some authority), pressing the brake pedal does not mean the pads touch disk. What happens most of the time, and for most of the braking right up until the car comes to a stop, is that the electric motor is turned into an electric generator. I can watch the meter on the dashboard switch from sucking-juice-from-battery to dumping-juice-in when I hit the brakes. I also assume there are some large capacitors involved, as I can't imagine any battery likes having 30kW being dumped into it.

As far as I can tell the only time pads touch disk are 1) emergency stops when the generator can't cause enough load to safely stop the vehicle 2) below about 10mph (not much load from the generator) and 3) the battery is fully charged and has no room for additional electrons. The transition from generator to pad-and-disk can be felt if one is looking for it.

In summary, the vast majority of the braking on the Nissan Leaf appears to be done without the conventional brakes. I assume the Tesla works in a similar manner, hence my comment.

EDIT: added a third reason for conventional brake use.
OTOH, sometimes our perception is multiplicative when it should be relative: charge me $100 extra on a house, I probably won't even notice; charge me $100 extra on a bar of chocolate, there's no way I'm going to buy it. But either way I lose $100!
What's with the Extremetech mobile site for iPad? There's nothing but black and a slow moving "ring of death" for like 30 seconds. Then I can see the page, but nothing responds for forever. Then after about a minute, the page is all there but then has to refresh again. What is this? Completely incompetent. Does anyone even test this? I'm on wired connection over 802.11n. There's no excuse for this dial up modem like performance!
There are lots of examples. For instance, you can interpret Maxwell equations as certain statements about de Rham cohomology classes of certain 2-forms on 4-manifolds. Fiber bundles are used to describe local symmetries in gauge theories, and since fiber bundles are connected with homotopy groups, they also find their use. Even K-theory is used, in string theory. The list could easily go on.

EDIT: fixed mistake.
Unless your dealership is hundreds of miles away...
I think they wouldn't do that, but you don't need a SEO magic when you are backed by two of the biggest names in search.
Richard Hammings "Learning to learn" course video lectures
I got excited, and then saw it was a blog post, not a repo. Which, I think, is an interesting reaction, itself.

Completely separately, this looks like a great tutorial. I've been dragging my heels about getting into OS X/iOS development, and this just might be the kick in the pants I need.
First, since I took this class just a year ago, I can answer all of these questions. Will I be able to do so in two or three years? Probably not. Some things like heapsort already start to fade away in my mind. But if, even in 20 years, Ijust open Cormen et al. and take a brief look I will remember.

If you have passed the class in university and now feel bad that you can't answer these questions, don't worry. It does not matter. If you want to work at Google, work through Cormen again before the interview.

Feel free to pick your favourite field like Compilers or Machine Learning and put a basic question to the author of the quiz, when you meet him in person. If he can't answer, pat yourself on the back and feel free to consider yourself a better software developer.
Answer this: Why would they apply to get their money back, knowing full well that they wouldn't? What would be a reasonable explanation for this action?
Being backed by Apple, Microsoft, Google and Facebook will tend to have that effect. They'll be fine.
Tee fury
Yes and the US air force stole the designs from the Nazi's after ww2. There are a number of images floating around that showed the nazi's were testing designs with Saucers, that being said it is only really the tin foil hat crew that would believe this crazyness.

http://www.thesun.co.uk/sol/homepage/features/3546515/Hitler...

http://www.naziufos.com/

https://www.google.co.uk/search?q=nazi+Saucers&ie=utf-8&...

yes yes some of these links are very questionable :/ But where the hell do you find information about hese things. Personally I have always had the option that there must be grains of truths in even the oddest conspiry theorys.

tl:dr = nazi's started hte reseach, before the end of WW2 they destoryed most of it to stop the allies getting it. Allies saw it, tried to replicate it and failed badly. The Real tinhatcrew believes that the nazi's that escaped took this research to russia, how has also experimented with saucers.

if i remember correctly the usa could only get them to hover about 12ft off the ground :/
So if Mozilla is involved, how does MDN factor into this? Are both expected to co-exist?

Edit: addressed here https://hacks.mozilla.org/2012/10/welcoming-the-new-kid-web-...
Per mile from the dealership. I live about 100 miles from the nearest dealership, but I was told they'd come to me for $100 per service. (Presumably there'd also be some sort of variable charge for parts/labor)

The $600/yr contract doesn't really change my opinion of anything (over six years it's $3.6k on a $60-90k car) except to confuse me a bit.

I find the claims about warranties being voided over trivialities much more concerning. If I get a flat tire, I don't want to arrange for Tesla-brand service, I want to fix the tire.
And... the site is down!
The end of any website dedicated to programming for the Web?
With due respect, a 'high level' customer can buy just another car if he has problem with it, he can afford to, while 'low level' customers have to speak out loud because that is all what they have, it is a heavy and rare investment for them.

The 'issue' is not morally acceptable. First of all there shouldn't be any distinction between customers, it is the company's responsibility to offer the best product, whoever the customer is. How can you be ignorant to a customer who invests a big chunk of his earnings to buy your product.
In Portugal, Switzerland and Germany I never knew about the HR department accepting any candidate without CS degree or related field (e.g Electronics), in the companies I worked for.
For vim, there's lots of good stuff:

- https://github.com/eraserhd/vim-ios

- http://www.vim.org/scripts/script.php?script_id=2674

- Clang-Complete, which gives you XCode's Clang autocompletion in vim https://github.com/Rip-Rip/clang_complete
Wonderful, just wonderful. I'm glad to have woken up today to find the first item on Hacker News to be several big-name companies collaborating to bring several technologies forwards and more standardized, instead of fighting against each-other for the proprietary implementations of trivial things.
I just saw in a comment from the user dsego in the "You and your research" re-submission a link to a video version of this essay of Hamming (which I have seen before), and I was very surprised to see that the complete "Learning to learn" course is now available online on video. There is a Kindle book available that I think consists of notes for this course:

http://www.amazon.com/The-Doing-Science-Engineering-ebook/dp...
The weirdest beat'em ups based on real life figures
To remove stuff?
I have also made the observation that coming back to mathematics after a few months makes it seem much easier. Several famous mathematicians pointed out this effect as well (I can only recall Bertrand Russell saying it at the moment). It even works on a day to day basis when it comes to solving problems.

In university, there were several times where I would spend all night working on some proofs and would go to sleep having made almost no progress. I would have dreams about the proofs (this made for restless sleep) but upon waking I would have many new insights into the problem and would be able to prove it. Conscious thinking about problems only seems to be reliable if you have faced (and solved) a similar problem before.

If there were some way to exploit this effect to maximum benefit, that would be awesome.
The Nissan Leaf is designed for short trips and city driving primarily. In those conditions a significant amount of braking is done under 10 miles an hour.

Also, in almost all 2 wheel drive cars, regenerative braking only applies to the wheels being driven and standard, dynamic braking is applied to the non-powered wheels.

I would sincerely be amazed if your brake pads lasted you even half the lifetime of the car and I will willingly hold my hands up and admit defeat if I'm wrong.
I saw this on 60 minutes last night. While there could be some truth to elements of it, the whole story just goes against so many things that the US should actually value, such as a free market. I think the best part of the whole story was the example of a man who was visited by federal agents due to his Huawei installation, and he saying something along the lines of "i had no other option, Cisco doesnt make everything i need, there are no other US companies that provide all the parts". He made a decision to buy the right level of cost & quality he required, and because of it gets visited by the government? Sounds a little insane to me, so much for the state staying out of other peoples business...
Yes, fair enough -- in that case, I had to either choose a gender for one word or go with one of those malaprops like "they".
Sorry, I misunderstood. I agree with the claims of the warranty being voided for minor repairs being outlandish. I've yet to see an official source for the claim though.
Christopher Alexander's "Timeless Way of Building"
It's a real shame that this theory is proposed over and over again.

It simultaneously puts the iPhone buying public down as ill-informed shopping sheep and elevates those that go in intending to buy an Android phone from the get-go.

I personally think better of most people. They buy phones for a variety of reasons, trickery by nefarious phone store salesmen, taking advantage of poor victimized and gullible iPhone buyers is probably very low on the list.
That would be onswipe [http://onswipe.com/]. They offer a plugin/integration that makes your site "mobile ready" and optimized, meanwhile displaying ads and getting revenue from that.

Except they don't. They just overrule scrolling and cut off content and bombard you with ads. There is a lengthly bashing of them here http://news.ycombinator.com/item?id=2699610.

"OnSwipe has become a perfect tool for preventing me from viewing content I'd otherwise happily read."
Recently I've hear Daniel Ek talk about the Spotify birth and business model, it gives you a better ideia of the path Spotify has taken, and answering questions about the differences about music and video services

http://ecorner.stanford.edu/authorMaterialInfo.html?mid=2964
Apple Shareholders Demand Security Risk Reports From the Board
The ability to have two (or more) accounts per number might be good for separating business/personal uses on one device if they can track it that way. The limitation of (generally) one phone number per device is restrictive.

Yes, I know you can work around this a bit w/Google Voice and such, but I would prefer my phone to act more like an email client where I can send/receive from multiple accounts seamlessly.
> Those are part of the "existing-in-modern-society-as-a-human-being competency matrix", along with bathing and wearing pants as often as possible.

Excuse me but did you just present attitude, communication and other soft-skills as an absolute bare minimum and a total given that pretty much anyone "existing-in-modern-society-as-a-human-being" would live up to anyway? Where is this dream world and how do I get there?

Need I remind you of examples like geeks practically sexually harassing girls at conferences in this day and age? Or the insane amount of social-anxiety / communications / soft-skills related cries for self-help all over the net? We are FAR from any of this being a standard.
> My implementation approximates an ideal geosphere by recursively subdividing a starting shape – in this case an octahedron.

I implemented an Octahedral geosphere for a space game in Panda 3D. Otherwise, you'd get artifacts when looking down at the poles of a planet, where all those longitude segments intersected.
Well the paywall thing is a huge deal-killer for me although I love the a response dashboard system they've built. For those of you conducting surveys, what are some good alternatives?
ITU's Bizarre Claim To Have A Mandate Over Internet Security
GCS regularly conducts validation surveys which measure the incidence rates of common health issues like asthma, smoking and disability along with consumption of various media to make sure it's sample is representative of the population. It's pretty accurate. You can read more about it here: http://www.google.com/insights/consumersurveys/static/consum...
If a webmaster is looking: "Your first look at JavaScript" [1] is duplicated from [2]. However, what should be internal links in [1] take you to [2]. For example, search "where to put javascript" in the first document.

[1] http://docs.webplatform.org/wiki/tutorials/your_first_look_a...

[2] http://www.w3.org/wiki/Your_first_look_at_JavaScript#Where_t...
So, trying this, it doesn't seem to work for Text messages, at least across carriers.

It does work for Phone calls, however.

Out of curiosity, I checked, and the major services that you might want to run over a phone - FLOWERS, PIZZA, etc, seem to be taken.
I still write software (free) and articles -- my most recent:

http://arachnoid.com/MySQL

http://arachnoid.com/python/DBClient

And in the summertime I travel around by boat in Alaska:

http://arachnoid.com/alaska2012
nice content :D
Variable naming and early exits are not details. They are fundamental issues, two of the most common causes of shitty code. Most programmers don't understand how important they are and relegate them to the pile of "coding standards" or just want to debate their theroetical pros and cons. Just look at what's happened to this thread.
So. What would be the salary at level 12?
XNA seems to be in a zombie state
http://forums.wpcentral.com/developers/180590.htm

All the official Metro documentation only talks about DirectX with C++.

But my point was that the title used by the original post was misleading.

If you need to use C++, then there are better engines than an XNA API clone.
Food for thought - improve your mental function with your daily meal
Checked the "No Tears HTML5 Game Development Tutorial" at http://docs.webplatform.org/wiki/tutorials/canvas_notearsgam... and:

- "Because this is a No Tears guide, we'll use jQuery"

- Use setInterval() rather than requestAnimationFrame().

- Questionable class-like implementation.

Granted the original HTML5rocks! post is over a year and a half old, but bad code and bad practices are NOT helping the cause.
Apple was probably concerned with the security implications of providing Safari with access to the local file system.
It is not a dumb question, but the answer is almost certainly not.

It wouldn't be that difficult to design a computer to process graphics a lot faster in greyscale (you need to use one byte for the color and one for the alpha) since each pixel requires less computation.

In practice if your graphic card only worked in greyscale, it wouldn't be worth the cost of development and so nobody would do it.
OK, but "70 percent of Huawei’s $32 billion revenue comes from outside China."[1] I think it's safe to assume that spying would be bad for business.

[1] http://www.nytimes.com/2012/09/15/business/global/15iht-tele...
For me the coolest feature is the "reply with contact info". You meet someone new and before parting, they ask for your contact info -- instead of standing around as they type in your cell or email, you just say "call MYNAME to get my info."
Wow, this youtube user also has the complete "Learning to learn" course video lectures available, I made a separate submission out of this as I know the course from Hammings book based on it and it's excellent stuff, I was really happy discovering it.
"Huawei" and "innovation" in the same sentence. Ha!
Google launches credit card in the UK
Sorry, should have clarified. I meant I like the article in its entirety: same titles but different levels, publicly defined criteria for levels and compensation determination, biannual reviews, bonus vs profit sharing, and oh my the benefits! etc.

However, in terms of transparency, agreed about the challenge to adoption. From the writing: "Many companies try to obfuscate the rules they use for determining compensation in hopes that they won't get caught paying some people too much and others too little."

I've seen internal H1-postings for junior developers (2-4 yrs exp) listing salary ranges 30% more than mine (12+ yrs exp).

Just saying...
Actually, impatience is the virtue. http://threevirtues.com/
I don't see anyone asking the obvious question: how much of this is just posturing in an election year?

Huawei's been around in the States forever, and I'm certain they have countless government contracts in place of varying sensitivity. Call me a paranoid, but a month before the elections, I tend to question every newsbit I see and hear as being politically motivated for personal gain.
What parent said is correct, categorically or not: regenerative braking does not use conventional pad-and-disk. It uses the electric motor to slow the car by turning the motor into a generator. The fact that a Nissan Leaf has pads and disks does not change this.
Will NASA Ever Recover Apollo 13′s Plutonium From the Sea? (2011)
Some further info on the VZ-9 Avrocar referenced in the article: http://www.zl2al.com/blog/the-avro-flying-saucer
Some people have 10 years of experience. Others have 1 year of experience 10 times.
If I understand correctly, Google supplies the traffic.
My favorite hidden gem in iOS6 is the ability to debug webapps with Safari's Web Inspector.
No, but perhaps something like iMessage is better. No fee and it's also an email address. Seems more useful.
"Web Developer" as in "Developed the Web," I guess..
If a tire rotation damages the regenerative breaking then someone designed something horribly wrong.

Your decisions are your own. Which is a great thing. Forcing a decision in an industry with so much law history is not a good move.
Apple and Google Spend More on Patents Than on Research and Development
Surprisingly the content of robots.txt is:

User-agent: *
Disallow: /

http://webplatform.org/robots.txt
I think nothing short of shutting down the website will make them move down the google search result page.

Even mdn can't touch w3schools after all those years.
I was just thinking about this too. If the networks were up to it, we could have multiple addresses. Not just for receiving, but for sending.

A "phone number" is unnecessary.
"GOOGLE (466453) is in use."
I wonder how many squatters are already holding these hostage.
PS, I wouldn't have gone through with it.
I just integrated it with my project which uses Django and Tastypie. Thanks for your effort.
Take a look at this: http://en.wikipedia.org/wiki/Regenerative_brake

Yes, the leaf has standard brakes... but it also uses regenerative braking to recapture some of the car's forward momentum without using the brakes.
It's a wiki. Why not fix it?
So happy to see Microsoft on this list. There's hope for IE yet.
That question only seems to appear in the press release - it may be a reference to an earlier study, but press releases don't tend to cite sources. The paper in question is theoretical, although it gives an example with the intensity of various human and animal sounds. (I have access through my university)
JSONiq - The SQL of NoSQL
Actually, it is not just a 'hip, new word'. It's entirely different than engine braking. Regenerative breaking actually captures some of the energy otherwise lost. It also works by simply pushing the brake pedal. Engine braking does neither of those things.

I own a '07 Prius with 90K miles, still on the factory brake pads. I expect them to last until at least 150K, if not more.
Does prototyping up your awesome API-based app really have to be so hard?
"This webpage is not available"

If that isn't a universal standard, then I don't know what is.
Article has Mercedes costs completely wrong. My S63 has around 50,000 miles on it but I've gone through four sets of brake pads. And mysteriously, the rotors are always "just under spec" and always need replacing too. That's $3000 per brake job, not to mention the myriad other issues they discover on every service. The base price for regular service doesnt begin to cover the costs. Luckily I didn't have to pay for the engine work once to fix a stuck lifter and again when it was spewing oil all over the road. Admittedly, I drive my car a little harder than most, but costs are costs.

I should get my Tesla model S around June and eagerly await the same performance with only $600 a year maintenance.
Hacker group RedHack faces up to 24 years in prison for terrorist crimes
You only buy a house once, you buy chocolate bars all the time. $100 on a chocolate bar every time compounds.
That experiment was Vietnam. You need to read its main reference.
They have 9, thus Falcon 9.
I think the point is to show that stereotypes generate anxiety that subsequently affects performance, something which most people who do not face stereotypes in their day to day lives take into account.

It would be really interesting to see if positive stereotypes like the Asian model minority stereotype have the opposite impact of improving test performance.
Hamming's essay isn't about winning Nobel prizes.

Hamming's essay isn't about inventing something no-one's come up with before.

Hamming's essay is about doing great work, solving important problems, and having significance.

He provides explicit definitions for what those things are in the essay, as I did in my response. As such, none of your flippant retorts make sense within the context of either the essay or my initial response to you.

I award you no points, and may God have mercy on your soul.
I agree. I'm a mathematician working in quantum topology, and this article seems to equal parts vague and incoherent.

As for this "Wow! Topology impacts physics! Useful for the first time!" is total bullshit. The interaction between topology and physics goes back a century, or centuries. The work of Poincare, the father of modern topology, for example, was motivated by studying PDEs and the behavior of dynamical systems. More spectacular is the work of the last 30 years, starting with the work of Donaldson in the 80s, and later work by Witten, between gauge theory (the mathematical formalism of the standard model) and the topology of 4-dimensional spaces. It is beautiful story, much like the origins of calculus or the application of ideas from differential geometry in the foundations of general relativity.
Article has Mercedes costs completely wrong. My S63 has around 50,000 miles on it but I've gone throw four sets of brake pads. And mysteriously, the rotors are always "just under spec" and need replacing too. That's $3000 per brake job. The base price for regular service doesnt begin to cover the costs. Admittedly, I drive my car a little harder than most, but not -that- much harder.

I should get my Tesla model S around June and eagerly await the same performance with only $600 a year maintenance.